If/when this ends up being included in the repo I would like to request that it includes the HW accelerated video decoding patch. That would be the only good reason someone could have for using Chromium over Chrome imo.

Basically, Chromium has few versions every day, but you can stick with a version for about a month before you need to upgrade.
dev
Snapshots (known as "Nightly" or "Dev" builds) builds are compiles of the Chromium code whenever there are submitted code changes. A snapshot build will be created as long as the code compiles successfully. Its binary files are stored in the Snapshots repository of Google Storage.
lkgr
Each snapshot build is then run through the automated tests. If that snapshot build successfully passes the automated tests, it is considered as a good build: LKGR (Last Known Good Revision)... and can become potentially a stable build.
Note LKGR builds were stored in the Continuous repository until Friday, 18 Mar 2016 (1 year ago). The Chromium team has removed few LKGR builders (407399, 576253 and chromium-dev) but other ones still work (list, latest commit, latest builds). Finally, there is no LKGR binary shared by the Chromium team... but any developer can re-compile it! ^^

I just copied the gentoo one's for now but it should be possible to pass private keys to solbuild somehow. It looks like this in the package.yml for now google_api_key="${google_api_key}" I guess itś up to ikey on how to implement it.

Atm, i'm trying to replace as many as the bundled dependencies as I can with system one's. One painfully long build after another.

I just copied the gentoo one's for now but it should be possible to pass private keys to solbuild somehow. It looks like this in the package.yml for now google_api_key="${google_api_key}" I guess itś up to ikey on how to implement it.
Atm, i'm trying to replace as many as the bundled dependencies as I can with system one's. One painfully long build after another.

Happy to help with the arduous rebuilds if you want, have an i7 w 32GB RAM that I'm happy to put to work.

Yeah, I totally agree. Solus-optimized Chromium in repository > Google Chrome from dirty third-party :P
Not saying that actual Google Chrome isn't usable. What I mean is Chromium in repository is more civilized way to handle software. Ya'know, auto-updates, full control of build process etc.